cpython/Python/critical_section.c

#include "Python.h"

#include "pycore_lock.h"
#include "pycore_critical_section.h"

#ifdef Py_GIL_DISABLED
static_assert(_Alignof(PyCriticalSection) >= 4,
              "critical section must be aligned to at least 4 bytes");
#endif

void
_PyCriticalSection_BeginSlow(PyCriticalSection *c, PyMutex *m)
{ … }

void
_PyCriticalSection2_BeginSlow(PyCriticalSection2 *c, PyMutex *m1, PyMutex *m2,
                              int is_m1_locked)
{ … }

#ifdef Py_GIL_DISABLED
static PyCriticalSection *
untag_critical_section(uintptr_t tag)
{
    return (PyCriticalSection *)(tag & ~_Py_CRITICAL_SECTION_MASK);
}
#endif

// Release all locks held by critical sections. This is called by
// _PyThreadState_Detach.
void
_PyCriticalSection_SuspendAll(PyThreadState *tstate)
{ … }

void
_PyCriticalSection_Resume(PyThreadState *tstate)
{ … }

#undef PyCriticalSection_Begin
void
PyCriticalSection_Begin(PyCriticalSection *c, PyObject *op)
{ … }

#undef PyCriticalSection_End
void
PyCriticalSection_End(PyCriticalSection *c)
{ … }

#undef PyCriticalSection2_Begin
void
PyCriticalSection2_Begin(PyCriticalSection2 *c, PyObject *a, PyObject *b)
{ … }

#undef PyCriticalSection2_End
void
PyCriticalSection2_End(PyCriticalSection2 *c)
{ … }